./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/eca-rers2012/Problem19_label27.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 6b4ec56b Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0d4ddb1-dd1c-466a-8b8d-54b8ee43569d/bin/uautomizer-ug76WZFUDN/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0d4ddb1-dd1c-466a-8b8d-54b8ee43569d/bin/uautomizer-ug76WZFUDN/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0d4ddb1-dd1c-466a-8b8d-54b8ee43569d/bin/uautomizer-ug76WZFUDN/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0d4ddb1-dd1c-466a-8b8d-54b8ee43569d/bin/uautomizer-ug76WZFUDN/config/AutomizerReach.xml -i ../../sv-benchmarks/c/eca-rers2012/Problem19_label27.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0d4ddb1-dd1c-466a-8b8d-54b8ee43569d/bin/uautomizer-ug76WZFUDN/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0d4ddb1-dd1c-466a-8b8d-54b8ee43569d/bin/uautomizer-ug76WZFUDN --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 6ab24122cfbae27f78ca86ca1d1162f9de3aff1954d8424bcfc24fa3959df5e7 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-6b4ec56 [2022-11-20 12:14:47,070 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-20 12:14:47,072 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-20 12:14:47,120 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-20 12:14:47,121 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-20 12:14:47,122 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-20 12:14:47,127 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-20 12:14:47,129 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-20 12:14:47,131 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-20 12:14:47,137 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-20 12:14:47,138 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-20 12:14:47,139 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-20 12:14:47,141 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-20 12:14:47,142 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-20 12:14:47,146 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-20 12:14:47,147 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-20 12:14:47,149 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-20 12:14:47,156 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-20 12:14:47,157 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-20 12:14:47,159 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-20 12:14:47,161 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-20 12:14:47,165 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-20 12:14:47,168 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-20 12:14:47,169 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-20 12:14:47,173 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-20 12:14:47,177 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-20 12:14:47,178 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-20 12:14:47,179 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-20 12:14:47,180 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-20 12:14:47,181 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-20 12:14:47,182 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-20 12:14:47,182 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-20 12:14:47,184 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-20 12:14:47,185 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-20 12:14:47,187 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-20 12:14:47,187 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-20 12:14:47,188 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-20 12:14:47,188 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-20 12:14:47,189 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-20 12:14:47,190 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-20 12:14:47,191 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-20 12:14:47,192 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0d4ddb1-dd1c-466a-8b8d-54b8ee43569d/bin/uautomizer-ug76WZFUDN/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-11-20 12:14:47,250 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-20 12:14:47,250 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-20 12:14:47,251 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-20 12:14:47,251 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-20 12:14:47,252 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-20 12:14:47,252 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-20 12:14:47,253 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-20 12:14:47,253 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-20 12:14:47,253 INFO L138 SettingsManager]: * Use SBE=true [2022-11-20 12:14:47,253 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-20 12:14:47,253 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-20 12:14:47,254 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-20 12:14:47,254 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-20 12:14:47,254 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-20 12:14:47,254 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-20 12:14:47,254 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-20 12:14:47,255 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-20 12:14:47,255 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-20 12:14:47,255 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-20 12:14:47,255 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-20 12:14:47,255 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-20 12:14:47,256 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-20 12:14:47,256 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-20 12:14:47,256 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-20 12:14:47,256 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-20 12:14:47,256 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-20 12:14:47,257 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-20 12:14:47,257 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-20 12:14:47,257 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-20 12:14:47,257 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-20 12:14:47,257 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-20 12:14:47,258 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-20 12:14:47,258 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-20 12:14:47,258 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0d4ddb1-dd1c-466a-8b8d-54b8ee43569d/bin/uautomizer-ug76WZFUDN/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0d4ddb1-dd1c-466a-8b8d-54b8ee43569d/bin/uautomizer-ug76WZFUDN Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6ab24122cfbae27f78ca86ca1d1162f9de3aff1954d8424bcfc24fa3959df5e7 [2022-11-20 12:14:47,495 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-20 12:14:47,517 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-20 12:14:47,520 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-20 12:14:47,521 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-20 12:14:47,522 INFO L275 PluginConnector]: CDTParser initialized [2022-11-20 12:14:47,523 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0d4ddb1-dd1c-466a-8b8d-54b8ee43569d/bin/uautomizer-ug76WZFUDN/../../sv-benchmarks/c/eca-rers2012/Problem19_label27.c [2022-11-20 12:14:50,696 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-20 12:14:51,410 INFO L351 CDTParser]: Found 1 translation units. [2022-11-20 12:14:51,410 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0d4ddb1-dd1c-466a-8b8d-54b8ee43569d/sv-benchmarks/c/eca-rers2012/Problem19_label27.c [2022-11-20 12:14:51,467 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0d4ddb1-dd1c-466a-8b8d-54b8ee43569d/bin/uautomizer-ug76WZFUDN/data/d70680bfc/3b772d3247ea47d296595eb15a9b4d60/FLAG67ae3da0d [2022-11-20 12:14:51,484 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0d4ddb1-dd1c-466a-8b8d-54b8ee43569d/bin/uautomizer-ug76WZFUDN/data/d70680bfc/3b772d3247ea47d296595eb15a9b4d60 [2022-11-20 12:14:51,490 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-20 12:14:51,492 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-20 12:14:51,493 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-20 12:14:51,493 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-20 12:14:51,497 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-20 12:14:51,498 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 12:14:51" (1/1) ... [2022-11-20 12:14:51,499 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1691d0e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:14:51, skipping insertion in model container [2022-11-20 12:14:51,500 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 12:14:51" (1/1) ... [2022-11-20 12:14:51,507 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-20 12:14:51,727 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-20 12:14:52,113 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0d4ddb1-dd1c-466a-8b8d-54b8ee43569d/sv-benchmarks/c/eca-rers2012/Problem19_label27.c[3867,3880] [2022-11-20 12:14:53,811 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-20 12:14:53,823 INFO L203 MainTranslator]: Completed pre-run [2022-11-20 12:14:53,853 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0d4ddb1-dd1c-466a-8b8d-54b8ee43569d/sv-benchmarks/c/eca-rers2012/Problem19_label27.c[3867,3880] [2022-11-20 12:14:54,915 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-20 12:14:54,955 INFO L208 MainTranslator]: Completed translation [2022-11-20 12:14:54,956 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:14:54 WrapperNode [2022-11-20 12:14:54,956 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-20 12:14:54,957 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-20 12:14:54,957 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-20 12:14:54,958 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-20 12:14:54,965 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:14:54" (1/1) ... [2022-11-20 12:14:55,063 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:14:54" (1/1) ... [2022-11-20 12:14:56,127 INFO L138 Inliner]: procedures = 19, calls = 13, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 9425 [2022-11-20 12:14:56,128 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-20 12:14:56,129 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-20 12:14:56,129 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-20 12:14:56,129 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-20 12:14:56,154 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:14:54" (1/1) ... [2022-11-20 12:14:56,154 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:14:54" (1/1) ... [2022-11-20 12:14:56,568 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:14:54" (1/1) ... [2022-11-20 12:14:56,583 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:14:54" (1/1) ... [2022-11-20 12:14:57,171 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:14:54" (1/1) ... [2022-11-20 12:14:57,219 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:14:54" (1/1) ... [2022-11-20 12:14:57,277 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:14:54" (1/1) ... [2022-11-20 12:14:57,302 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:14:54" (1/1) ... [2022-11-20 12:14:57,476 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-20 12:14:57,477 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-20 12:14:57,478 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-20 12:14:57,478 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-20 12:14:57,479 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:14:54" (1/1) ... [2022-11-20 12:14:57,486 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-20 12:14:57,501 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0d4ddb1-dd1c-466a-8b8d-54b8ee43569d/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 12:14:57,524 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0d4ddb1-dd1c-466a-8b8d-54b8ee43569d/bin/uautomizer-ug76WZFUDN/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-20 12:14:57,549 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0d4ddb1-dd1c-466a-8b8d-54b8ee43569d/bin/uautomizer-ug76WZFUDN/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-20 12:14:57,576 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-20 12:14:57,576 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-20 12:14:57,576 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-20 12:14:57,576 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-20 12:14:57,664 INFO L235 CfgBuilder]: Building ICFG [2022-11-20 12:14:57,666 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-20 12:15:08,614 INFO L276 CfgBuilder]: Performing block encoding [2022-11-20 12:15:08,641 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-20 12:15:08,641 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-20 12:15:08,647 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 12:15:08 BoogieIcfgContainer [2022-11-20 12:15:08,647 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-20 12:15:08,651 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-20 12:15:08,651 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-20 12:15:08,654 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-20 12:15:08,654 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 12:14:51" (1/3) ... [2022-11-20 12:15:08,656 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@8857c19 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 12:15:08, skipping insertion in model container [2022-11-20 12:15:08,657 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:14:54" (2/3) ... [2022-11-20 12:15:08,657 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@8857c19 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 12:15:08, skipping insertion in model container [2022-11-20 12:15:08,658 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 12:15:08" (3/3) ... [2022-11-20 12:15:08,662 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem19_label27.c [2022-11-20 12:15:08,682 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-20 12:15:08,683 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-20 12:15:08,792 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-20 12:15:08,799 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@7a6262e6, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-20 12:15:08,800 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-20 12:15:08,812 INFO L276 IsEmpty]: Start isEmpty. Operand has 1748 states, 1746 states have (on average 1.8699885452462772) internal successors, (3265), 1747 states have internal predecessors, (3265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:15:08,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-11-20 12:15:08,820 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:15:08,820 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:15:08,821 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 12:15:08,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:15:08,828 INFO L85 PathProgramCache]: Analyzing trace with hash -438767135, now seen corresponding path program 1 times [2022-11-20 12:15:08,838 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:15:08,839 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1058974757] [2022-11-20 12:15:08,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:15:08,840 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:15:08,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:15:09,191 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:15:09,191 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:15:09,192 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1058974757] [2022-11-20 12:15:09,193 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1058974757] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 12:15:09,193 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 12:15:09,194 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 12:15:09,196 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [11689124] [2022-11-20 12:15:09,196 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 12:15:09,200 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 12:15:09,202 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:15:09,241 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 12:15:09,242 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 12:15:09,250 INFO L87 Difference]: Start difference. First operand has 1748 states, 1746 states have (on average 1.8699885452462772) internal successors, (3265), 1747 states have internal predecessors, (3265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 9.0) internal successors, (27), 2 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:15:19,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:15:19,439 INFO L93 Difference]: Finished difference Result 4975 states and 9416 transitions. [2022-11-20 12:15:19,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 12:15:19,441 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 9.0) internal successors, (27), 2 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-11-20 12:15:19,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:15:19,476 INFO L225 Difference]: With dead ends: 4975 [2022-11-20 12:15:19,476 INFO L226 Difference]: Without dead ends: 3163 [2022-11-20 12:15:19,485 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 12:15:19,488 INFO L413 NwaCegarLoop]: 1353 mSDtfsCounter, 1519 mSDsluCounter, 171 mSDsCounter, 0 mSdLazyCounter, 4670 mSolverCounterSat, 1123 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1519 SdHoareTripleChecker+Valid, 1524 SdHoareTripleChecker+Invalid, 5793 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1123 IncrementalHoareTripleChecker+Valid, 4670 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.8s IncrementalHoareTripleChecker+Time [2022-11-20 12:15:19,489 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1519 Valid, 1524 Invalid, 5793 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1123 Valid, 4670 Invalid, 0 Unknown, 0 Unchecked, 9.8s Time] [2022-11-20 12:15:19,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3163 states. [2022-11-20 12:15:19,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3163 to 3123. [2022-11-20 12:15:19,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3123 states, 3122 states have (on average 1.6268417680973735) internal successors, (5079), 3122 states have internal predecessors, (5079), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:15:19,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3123 states to 3123 states and 5079 transitions. [2022-11-20 12:15:19,637 INFO L78 Accepts]: Start accepts. Automaton has 3123 states and 5079 transitions. Word has length 27 [2022-11-20 12:15:19,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:15:19,639 INFO L495 AbstractCegarLoop]: Abstraction has 3123 states and 5079 transitions. [2022-11-20 12:15:19,639 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.0) internal successors, (27), 2 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:15:19,640 INFO L276 IsEmpty]: Start isEmpty. Operand 3123 states and 5079 transitions. [2022-11-20 12:15:19,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2022-11-20 12:15:19,645 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:15:19,645 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:15:19,646 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-20 12:15:19,646 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 12:15:19,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:15:19,647 INFO L85 PathProgramCache]: Analyzing trace with hash -1976021609, now seen corresponding path program 1 times [2022-11-20 12:15:19,647 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:15:19,648 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1788760690] [2022-11-20 12:15:19,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:15:19,648 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:15:19,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:15:20,004 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:15:20,005 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:15:20,006 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1788760690] [2022-11-20 12:15:20,007 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1788760690] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 12:15:20,007 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 12:15:20,007 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 12:15:20,007 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1698842467] [2022-11-20 12:15:20,007 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 12:15:20,010 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 12:15:20,010 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:15:20,011 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 12:15:20,011 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 12:15:20,011 INFO L87 Difference]: Start difference. First operand 3123 states and 5079 transitions. Second operand has 3 states, 3 states have (on average 32.666666666666664) internal successors, (98), 2 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:15:29,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:15:29,992 INFO L93 Difference]: Finished difference Result 9053 states and 14813 transitions. [2022-11-20 12:15:29,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 12:15:29,993 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 32.666666666666664) internal successors, (98), 2 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 98 [2022-11-20 12:15:29,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:15:30,016 INFO L225 Difference]: With dead ends: 9053 [2022-11-20 12:15:30,017 INFO L226 Difference]: Without dead ends: 5932 [2022-11-20 12:15:30,022 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 12:15:30,023 INFO L413 NwaCegarLoop]: 1325 mSDtfsCounter, 1534 mSDsluCounter, 219 mSDsCounter, 0 mSdLazyCounter, 4265 mSolverCounterSat, 1473 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1534 SdHoareTripleChecker+Valid, 1544 SdHoareTripleChecker+Invalid, 5738 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1473 IncrementalHoareTripleChecker+Valid, 4265 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.7s IncrementalHoareTripleChecker+Time [2022-11-20 12:15:30,024 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1534 Valid, 1544 Invalid, 5738 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1473 Valid, 4265 Invalid, 0 Unknown, 0 Unchecked, 9.7s Time] [2022-11-20 12:15:30,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5932 states. [2022-11-20 12:15:30,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5932 to 5910. [2022-11-20 12:15:30,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5910 states, 5909 states have (on average 1.423421898798443) internal successors, (8411), 5909 states have internal predecessors, (8411), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:15:30,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5910 states to 5910 states and 8411 transitions. [2022-11-20 12:15:30,162 INFO L78 Accepts]: Start accepts. Automaton has 5910 states and 8411 transitions. Word has length 98 [2022-11-20 12:15:30,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:15:30,163 INFO L495 AbstractCegarLoop]: Abstraction has 5910 states and 8411 transitions. [2022-11-20 12:15:30,163 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 32.666666666666664) internal successors, (98), 2 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:15:30,163 INFO L276 IsEmpty]: Start isEmpty. Operand 5910 states and 8411 transitions. [2022-11-20 12:15:30,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2022-11-20 12:15:30,166 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:15:30,166 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:15:30,166 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-20 12:15:30,167 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 12:15:30,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:15:30,168 INFO L85 PathProgramCache]: Analyzing trace with hash -706001498, now seen corresponding path program 1 times [2022-11-20 12:15:30,168 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:15:30,168 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1868684837] [2022-11-20 12:15:30,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:15:30,169 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:15:30,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:15:30,411 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:15:30,412 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:15:30,412 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1868684837] [2022-11-20 12:15:30,412 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1868684837] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 12:15:30,412 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 12:15:30,413 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 12:15:30,413 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1111041354] [2022-11-20 12:15:30,413 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 12:15:30,414 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 12:15:30,414 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:15:30,416 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 12:15:30,416 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 12:15:30,416 INFO L87 Difference]: Start difference. First operand 5910 states and 8411 transitions. Second operand has 3 states, 3 states have (on average 41.333333333333336) internal successors, (124), 2 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:15:39,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:15:39,561 INFO L93 Difference]: Finished difference Result 17505 states and 24942 transitions. [2022-11-20 12:15:39,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 12:15:39,562 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 41.333333333333336) internal successors, (124), 2 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 124 [2022-11-20 12:15:39,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:15:39,598 INFO L225 Difference]: With dead ends: 17505 [2022-11-20 12:15:39,599 INFO L226 Difference]: Without dead ends: 11597 [2022-11-20 12:15:39,607 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 12:15:39,608 INFO L413 NwaCegarLoop]: 1533 mSDtfsCounter, 1750 mSDsluCounter, 273 mSDsCounter, 0 mSdLazyCounter, 4227 mSolverCounterSat, 1430 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1750 SdHoareTripleChecker+Valid, 1806 SdHoareTripleChecker+Invalid, 5657 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1430 IncrementalHoareTripleChecker+Valid, 4227 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.9s IncrementalHoareTripleChecker+Time [2022-11-20 12:15:39,609 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1750 Valid, 1806 Invalid, 5657 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1430 Valid, 4227 Invalid, 0 Unknown, 0 Unchecked, 8.9s Time] [2022-11-20 12:15:39,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11597 states. [2022-11-20 12:15:39,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11597 to 11578. [2022-11-20 12:15:39,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11578 states, 11577 states have (on average 1.2801243845555843) internal successors, (14820), 11577 states have internal predecessors, (14820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:15:39,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11578 states to 11578 states and 14820 transitions. [2022-11-20 12:15:39,817 INFO L78 Accepts]: Start accepts. Automaton has 11578 states and 14820 transitions. Word has length 124 [2022-11-20 12:15:39,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:15:39,818 INFO L495 AbstractCegarLoop]: Abstraction has 11578 states and 14820 transitions. [2022-11-20 12:15:39,818 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 41.333333333333336) internal successors, (124), 2 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:15:39,819 INFO L276 IsEmpty]: Start isEmpty. Operand 11578 states and 14820 transitions. [2022-11-20 12:15:39,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2022-11-20 12:15:39,830 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:15:39,830 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:15:39,831 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-20 12:15:39,831 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 12:15:39,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:15:39,835 INFO L85 PathProgramCache]: Analyzing trace with hash 1958742074, now seen corresponding path program 1 times [2022-11-20 12:15:39,835 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:15:39,835 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1224378661] [2022-11-20 12:15:39,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:15:39,836 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:15:39,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:15:40,061 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:15:40,062 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:15:40,062 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1224378661] [2022-11-20 12:15:40,062 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1224378661] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 12:15:40,062 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 12:15:40,063 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 12:15:40,063 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1818547243] [2022-11-20 12:15:40,063 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 12:15:40,064 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 12:15:40,064 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:15:40,064 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 12:15:40,065 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 12:15:40,065 INFO L87 Difference]: Start difference. First operand 11578 states and 14820 transitions. Second operand has 3 states, 3 states have (on average 44.0) internal successors, (132), 2 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:15:49,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:15:49,845 INFO L93 Difference]: Finished difference Result 34273 states and 43832 transitions. [2022-11-20 12:15:49,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 12:15:49,845 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 44.0) internal successors, (132), 2 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 132 [2022-11-20 12:15:49,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:15:49,895 INFO L225 Difference]: With dead ends: 34273 [2022-11-20 12:15:49,895 INFO L226 Difference]: Without dead ends: 22697 [2022-11-20 12:15:49,907 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 12:15:49,908 INFO L413 NwaCegarLoop]: 723 mSDtfsCounter, 2497 mSDsluCounter, 272 mSDsCounter, 0 mSdLazyCounter, 5120 mSolverCounterSat, 434 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2497 SdHoareTripleChecker+Valid, 995 SdHoareTripleChecker+Invalid, 5554 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 434 IncrementalHoareTripleChecker+Valid, 5120 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.5s IncrementalHoareTripleChecker+Time [2022-11-20 12:15:49,909 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2497 Valid, 995 Invalid, 5554 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [434 Valid, 5120 Invalid, 0 Unknown, 0 Unchecked, 9.5s Time] [2022-11-20 12:15:49,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22697 states. [2022-11-20 12:15:50,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22697 to 22694. [2022-11-20 12:15:50,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22694 states, 22693 states have (on average 1.238663905168995) internal successors, (28109), 22693 states have internal predecessors, (28109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:15:50,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22694 states to 22694 states and 28109 transitions. [2022-11-20 12:15:50,294 INFO L78 Accepts]: Start accepts. Automaton has 22694 states and 28109 transitions. Word has length 132 [2022-11-20 12:15:50,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:15:50,296 INFO L495 AbstractCegarLoop]: Abstraction has 22694 states and 28109 transitions. [2022-11-20 12:15:50,297 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 44.0) internal successors, (132), 2 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:15:50,297 INFO L276 IsEmpty]: Start isEmpty. Operand 22694 states and 28109 transitions. [2022-11-20 12:15:50,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 395 [2022-11-20 12:15:50,304 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:15:50,305 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:15:50,305 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-20 12:15:50,305 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 12:15:50,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:15:50,307 INFO L85 PathProgramCache]: Analyzing trace with hash 2087523823, now seen corresponding path program 1 times [2022-11-20 12:15:50,307 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:15:50,307 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1943653677] [2022-11-20 12:15:50,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:15:50,308 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:15:50,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:15:51,933 INFO L134 CoverageAnalysis]: Checked inductivity of 208 backedges. 183 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-11-20 12:15:51,933 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:15:51,933 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1943653677] [2022-11-20 12:15:51,933 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1943653677] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 12:15:51,934 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 12:15:51,934 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 12:15:51,934 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1776168064] [2022-11-20 12:15:51,934 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 12:15:51,935 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 12:15:51,935 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:15:51,936 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 12:15:51,936 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-20 12:15:51,936 INFO L87 Difference]: Start difference. First operand 22694 states and 28109 transitions. Second operand has 4 states, 4 states have (on average 92.5) internal successors, (370), 3 states have internal predecessors, (370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:16:05,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:16:05,151 INFO L93 Difference]: Finished difference Result 57752 states and 69837 transitions. [2022-11-20 12:16:05,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-20 12:16:05,151 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 92.5) internal successors, (370), 3 states have internal predecessors, (370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 394 [2022-11-20 12:16:05,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:16:05,217 INFO L225 Difference]: With dead ends: 57752 [2022-11-20 12:16:05,217 INFO L226 Difference]: Without dead ends: 35060 [2022-11-20 12:16:05,234 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-20 12:16:05,235 INFO L413 NwaCegarLoop]: 1805 mSDtfsCounter, 3756 mSDsluCounter, 355 mSDsCounter, 0 mSdLazyCounter, 9454 mSolverCounterSat, 244 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3756 SdHoareTripleChecker+Valid, 2160 SdHoareTripleChecker+Invalid, 9698 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 244 IncrementalHoareTripleChecker+Valid, 9454 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12.7s IncrementalHoareTripleChecker+Time [2022-11-20 12:16:05,236 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3756 Valid, 2160 Invalid, 9698 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [244 Valid, 9454 Invalid, 0 Unknown, 0 Unchecked, 12.7s Time] [2022-11-20 12:16:05,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35060 states. [2022-11-20 12:16:05,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35060 to 32288. [2022-11-20 12:16:05,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32288 states, 32287 states have (on average 1.1912844178771642) internal successors, (38463), 32287 states have internal predecessors, (38463), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:16:05,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32288 states to 32288 states and 38463 transitions. [2022-11-20 12:16:05,737 INFO L78 Accepts]: Start accepts. Automaton has 32288 states and 38463 transitions. Word has length 394 [2022-11-20 12:16:05,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:16:05,738 INFO L495 AbstractCegarLoop]: Abstraction has 32288 states and 38463 transitions. [2022-11-20 12:16:05,739 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 92.5) internal successors, (370), 3 states have internal predecessors, (370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:16:05,743 INFO L276 IsEmpty]: Start isEmpty. Operand 32288 states and 38463 transitions. [2022-11-20 12:16:05,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 423 [2022-11-20 12:16:05,752 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:16:05,752 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:16:05,753 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-20 12:16:05,754 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 12:16:05,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:16:05,755 INFO L85 PathProgramCache]: Analyzing trace with hash 850953557, now seen corresponding path program 1 times [2022-11-20 12:16:05,756 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:16:05,762 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1520297744] [2022-11-20 12:16:05,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:16:05,763 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:16:05,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:16:06,840 INFO L134 CoverageAnalysis]: Checked inductivity of 208 backedges. 208 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:16:06,840 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:16:06,840 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1520297744] [2022-11-20 12:16:06,841 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1520297744] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 12:16:06,841 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 12:16:06,841 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 12:16:06,841 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [9253722] [2022-11-20 12:16:06,841 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 12:16:06,842 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 12:16:06,843 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:16:06,843 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 12:16:06,844 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-20 12:16:06,844 INFO L87 Difference]: Start difference. First operand 32288 states and 38463 transitions. Second operand has 4 states, 4 states have (on average 105.5) internal successors, (422), 3 states have internal predecessors, (422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:16:15,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:16:15,104 INFO L93 Difference]: Finished difference Result 67335 states and 79703 transitions. [2022-11-20 12:16:15,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-20 12:16:15,105 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 105.5) internal successors, (422), 3 states have internal predecessors, (422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 422 [2022-11-20 12:16:15,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:16:15,164 INFO L225 Difference]: With dead ends: 67335 [2022-11-20 12:16:15,164 INFO L226 Difference]: Without dead ends: 35018 [2022-11-20 12:16:15,188 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-20 12:16:15,189 INFO L413 NwaCegarLoop]: 1776 mSDtfsCounter, 1153 mSDsluCounter, 179 mSDsCounter, 0 mSdLazyCounter, 5716 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1153 SdHoareTripleChecker+Valid, 1955 SdHoareTripleChecker+Invalid, 5724 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 5716 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.9s IncrementalHoareTripleChecker+Time [2022-11-20 12:16:15,190 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1153 Valid, 1955 Invalid, 5724 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 5716 Invalid, 0 Unknown, 0 Unchecked, 7.9s Time] [2022-11-20 12:16:15,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35018 states. [2022-11-20 12:16:15,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35018 to 35018. [2022-11-20 12:16:15,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35018 states, 35017 states have (on average 1.1765142645000999) internal successors, (41198), 35017 states have internal predecessors, (41198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:16:15,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35018 states to 35018 states and 41198 transitions. [2022-11-20 12:16:15,649 INFO L78 Accepts]: Start accepts. Automaton has 35018 states and 41198 transitions. Word has length 422 [2022-11-20 12:16:15,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:16:15,650 INFO L495 AbstractCegarLoop]: Abstraction has 35018 states and 41198 transitions. [2022-11-20 12:16:15,650 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 105.5) internal successors, (422), 3 states have internal predecessors, (422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:16:15,650 INFO L276 IsEmpty]: Start isEmpty. Operand 35018 states and 41198 transitions. [2022-11-20 12:16:15,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 515 [2022-11-20 12:16:15,660 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:16:15,661 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:16:15,661 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-20 12:16:15,661 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 12:16:15,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:16:15,662 INFO L85 PathProgramCache]: Analyzing trace with hash 1618907632, now seen corresponding path program 1 times [2022-11-20 12:16:15,662 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:16:15,662 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [228697214] [2022-11-20 12:16:15,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:16:15,663 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:16:15,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:16:16,164 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:16:16,164 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:16:16,165 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [228697214] [2022-11-20 12:16:16,165 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [228697214] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 12:16:16,165 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 12:16:16,165 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 12:16:16,166 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1537910416] [2022-11-20 12:16:16,166 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 12:16:16,167 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 12:16:16,167 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:16:16,167 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 12:16:16,167 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 12:16:16,168 INFO L87 Difference]: Start difference. First operand 35018 states and 41198 transitions. Second operand has 3 states, 3 states have (on average 171.33333333333334) internal successors, (514), 3 states have internal predecessors, (514), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:16:24,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:16:24,939 INFO L93 Difference]: Finished difference Result 78377 states and 94558 transitions. [2022-11-20 12:16:24,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 12:16:24,940 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 171.33333333333334) internal successors, (514), 3 states have internal predecessors, (514), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 514 [2022-11-20 12:16:24,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:16:25,003 INFO L225 Difference]: With dead ends: 78377 [2022-11-20 12:16:25,003 INFO L226 Difference]: Without dead ends: 46091 [2022-11-20 12:16:25,026 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 12:16:25,027 INFO L413 NwaCegarLoop]: 2744 mSDtfsCounter, 1508 mSDsluCounter, 179 mSDsCounter, 0 mSdLazyCounter, 4061 mSolverCounterSat, 1803 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1508 SdHoareTripleChecker+Valid, 2923 SdHoareTripleChecker+Invalid, 5864 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1803 IncrementalHoareTripleChecker+Valid, 4061 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.3s IncrementalHoareTripleChecker+Time [2022-11-20 12:16:25,028 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1508 Valid, 2923 Invalid, 5864 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1803 Valid, 4061 Invalid, 0 Unknown, 0 Unchecked, 8.3s Time] [2022-11-20 12:16:25,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46091 states. [2022-11-20 12:16:25,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46091 to 45986. [2022-11-20 12:16:25,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45986 states, 45985 states have (on average 1.167293682722627) internal successors, (53678), 45985 states have internal predecessors, (53678), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:16:25,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45986 states to 45986 states and 53678 transitions. [2022-11-20 12:16:25,581 INFO L78 Accepts]: Start accepts. Automaton has 45986 states and 53678 transitions. Word has length 514 [2022-11-20 12:16:25,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:16:25,582 INFO L495 AbstractCegarLoop]: Abstraction has 45986 states and 53678 transitions. [2022-11-20 12:16:25,582 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 171.33333333333334) internal successors, (514), 3 states have internal predecessors, (514), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:16:25,583 INFO L276 IsEmpty]: Start isEmpty. Operand 45986 states and 53678 transitions. [2022-11-20 12:16:25,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 727 [2022-11-20 12:16:25,605 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:16:25,606 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:16:25,606 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-20 12:16:25,606 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 12:16:25,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:16:25,607 INFO L85 PathProgramCache]: Analyzing trace with hash -77303177, now seen corresponding path program 1 times [2022-11-20 12:16:25,607 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:16:25,607 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1665097678] [2022-11-20 12:16:25,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:16:25,608 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:16:25,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:16:26,274 INFO L134 CoverageAnalysis]: Checked inductivity of 258 backedges. 49 proven. 0 refuted. 0 times theorem prover too weak. 209 trivial. 0 not checked. [2022-11-20 12:16:26,274 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:16:26,274 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1665097678] [2022-11-20 12:16:26,275 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1665097678] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 12:16:26,275 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 12:16:26,275 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 12:16:26,275 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1077052971] [2022-11-20 12:16:26,275 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 12:16:26,276 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 12:16:26,276 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:16:26,277 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 12:16:26,277 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 12:16:26,278 INFO L87 Difference]: Start difference. First operand 45986 states and 53678 transitions. Second operand has 3 states, 3 states have (on average 172.66666666666666) internal successors, (518), 3 states have internal predecessors, (518), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:16:36,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:16:36,326 INFO L93 Difference]: Finished difference Result 104403 states and 124098 transitions. [2022-11-20 12:16:36,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 12:16:36,327 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 172.66666666666666) internal successors, (518), 3 states have internal predecessors, (518), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 726 [2022-11-20 12:16:36,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:16:36,410 INFO L225 Difference]: With dead ends: 104403 [2022-11-20 12:16:36,411 INFO L226 Difference]: Without dead ends: 61149 [2022-11-20 12:16:36,439 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 12:16:36,440 INFO L413 NwaCegarLoop]: 3197 mSDtfsCounter, 1449 mSDsluCounter, 176 mSDsCounter, 0 mSdLazyCounter, 5099 mSolverCounterSat, 970 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1449 SdHoareTripleChecker+Valid, 3373 SdHoareTripleChecker+Invalid, 6069 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 970 IncrementalHoareTripleChecker+Valid, 5099 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.5s IncrementalHoareTripleChecker+Time [2022-11-20 12:16:36,440 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1449 Valid, 3373 Invalid, 6069 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [970 Valid, 5099 Invalid, 0 Unknown, 0 Unchecked, 9.5s Time] [2022-11-20 12:16:36,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61149 states. [2022-11-20 12:16:37,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61149 to 61057. [2022-11-20 12:16:37,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61057 states, 61056 states have (on average 1.1519097222222223) internal successors, (70331), 61056 states have internal predecessors, (70331), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:16:37,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61057 states to 61057 states and 70331 transitions. [2022-11-20 12:16:37,108 INFO L78 Accepts]: Start accepts. Automaton has 61057 states and 70331 transitions. Word has length 726 [2022-11-20 12:16:37,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:16:37,110 INFO L495 AbstractCegarLoop]: Abstraction has 61057 states and 70331 transitions. [2022-11-20 12:16:37,110 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 172.66666666666666) internal successors, (518), 3 states have internal predecessors, (518), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:16:37,110 INFO L276 IsEmpty]: Start isEmpty. Operand 61057 states and 70331 transitions. [2022-11-20 12:16:37,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 734 [2022-11-20 12:16:37,118 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:16:37,118 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:16:37,119 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-20 12:16:37,119 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 12:16:37,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:16:37,119 INFO L85 PathProgramCache]: Analyzing trace with hash -1180605806, now seen corresponding path program 1 times [2022-11-20 12:16:37,120 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:16:37,120 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [438223917] [2022-11-20 12:16:37,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:16:37,120 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:16:37,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:16:41,186 INFO L134 CoverageAnalysis]: Checked inductivity of 267 backedges. 49 proven. 218 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:16:41,187 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:16:41,187 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [438223917] [2022-11-20 12:16:41,187 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [438223917] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 12:16:41,187 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1321859108] [2022-11-20 12:16:41,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:16:41,188 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:16:41,188 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0d4ddb1-dd1c-466a-8b8d-54b8ee43569d/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 12:16:41,194 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0d4ddb1-dd1c-466a-8b8d-54b8ee43569d/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 12:16:41,227 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0d4ddb1-dd1c-466a-8b8d-54b8ee43569d/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-20 12:16:41,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:16:41,615 INFO L263 TraceCheckSpWp]: Trace formula consists of 849 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-20 12:16:41,632 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 12:16:41,735 INFO L134 CoverageAnalysis]: Checked inductivity of 267 backedges. 49 proven. 0 refuted. 0 times theorem prover too weak. 218 trivial. 0 not checked. [2022-11-20 12:16:41,735 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 12:16:41,736 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1321859108] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 12:16:41,736 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-20 12:16:41,736 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 8 [2022-11-20 12:16:41,736 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1360880653] [2022-11-20 12:16:41,737 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 12:16:41,738 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 12:16:41,738 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:16:41,738 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 12:16:41,738 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-11-20 12:16:41,739 INFO L87 Difference]: Start difference. First operand 61057 states and 70331 transitions. Second operand has 3 states, 3 states have (on average 172.0) internal successors, (516), 3 states have internal predecessors, (516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:16:51,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:16:51,522 INFO L93 Difference]: Finished difference Result 135904 states and 158829 transitions. [2022-11-20 12:16:51,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 12:16:51,524 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 172.0) internal successors, (516), 3 states have internal predecessors, (516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 733 [2022-11-20 12:16:51,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:16:51,727 INFO L225 Difference]: With dead ends: 135904 [2022-11-20 12:16:51,727 INFO L226 Difference]: Without dead ends: 77579 [2022-11-20 12:16:51,751 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 738 GetRequests, 732 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-11-20 12:16:51,751 INFO L413 NwaCegarLoop]: 3093 mSDtfsCounter, 1459 mSDsluCounter, 175 mSDsCounter, 0 mSdLazyCounter, 5007 mSolverCounterSat, 1004 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1459 SdHoareTripleChecker+Valid, 3268 SdHoareTripleChecker+Invalid, 6011 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1004 IncrementalHoareTripleChecker+Valid, 5007 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.1s IncrementalHoareTripleChecker+Time [2022-11-20 12:16:51,752 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1459 Valid, 3268 Invalid, 6011 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1004 Valid, 5007 Invalid, 0 Unknown, 0 Unchecked, 9.1s Time] [2022-11-20 12:16:51,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77579 states. [2022-11-20 12:16:52,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77579 to 76078. [2022-11-20 12:16:52,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76078 states, 76077 states have (on average 1.1446297829830303) internal successors, (87080), 76077 states have internal predecessors, (87080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:16:52,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76078 states to 76078 states and 87080 transitions. [2022-11-20 12:16:52,588 INFO L78 Accepts]: Start accepts. Automaton has 76078 states and 87080 transitions. Word has length 733 [2022-11-20 12:16:52,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:16:52,589 INFO L495 AbstractCegarLoop]: Abstraction has 76078 states and 87080 transitions. [2022-11-20 12:16:52,590 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 172.0) internal successors, (516), 3 states have internal predecessors, (516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:16:52,590 INFO L276 IsEmpty]: Start isEmpty. Operand 76078 states and 87080 transitions. [2022-11-20 12:16:52,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 935 [2022-11-20 12:16:52,602 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:16:52,603 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:16:52,609 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0d4ddb1-dd1c-466a-8b8d-54b8ee43569d/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-20 12:16:52,804 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0d4ddb1-dd1c-466a-8b8d-54b8ee43569d/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:16:52,804 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 12:16:52,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:16:52,805 INFO L85 PathProgramCache]: Analyzing trace with hash -838304579, now seen corresponding path program 1 times [2022-11-20 12:16:52,805 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:16:52,805 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [285013281] [2022-11-20 12:16:52,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:16:52,805 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:16:53,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:16:54,260 INFO L134 CoverageAnalysis]: Checked inductivity of 807 backedges. 573 proven. 0 refuted. 0 times theorem prover too weak. 234 trivial. 0 not checked. [2022-11-20 12:16:54,260 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:16:54,260 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [285013281] [2022-11-20 12:16:54,260 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [285013281] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 12:16:54,261 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 12:16:54,261 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-20 12:16:54,261 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1304980063] [2022-11-20 12:16:54,261 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 12:16:54,262 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 12:16:54,262 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:16:54,263 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 12:16:54,263 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-20 12:16:54,263 INFO L87 Difference]: Start difference. First operand 76078 states and 87080 transitions. Second operand has 4 states, 4 states have (on average 175.5) internal successors, (702), 4 states have internal predecessors, (702), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:17:10,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:17:10,459 INFO L93 Difference]: Finished difference Result 245284 states and 285310 transitions. [2022-11-20 12:17:10,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-20 12:17:10,460 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 175.5) internal successors, (702), 4 states have internal predecessors, (702), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 934 [2022-11-20 12:17:10,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:17:10,706 INFO L225 Difference]: With dead ends: 245284 [2022-11-20 12:17:10,707 INFO L226 Difference]: Without dead ends: 171938 [2022-11-20 12:17:10,754 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-20 12:17:10,755 INFO L413 NwaCegarLoop]: 1066 mSDtfsCounter, 3367 mSDsluCounter, 278 mSDsCounter, 0 mSdLazyCounter, 8804 mSolverCounterSat, 2886 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3367 SdHoareTripleChecker+Valid, 1344 SdHoareTripleChecker+Invalid, 11690 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 2886 IncrementalHoareTripleChecker+Valid, 8804 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 15.1s IncrementalHoareTripleChecker+Time [2022-11-20 12:17:10,756 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3367 Valid, 1344 Invalid, 11690 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [2886 Valid, 8804 Invalid, 0 Unknown, 0 Unchecked, 15.1s Time] [2022-11-20 12:17:10,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171938 states. [2022-11-20 12:17:12,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171938 to 166294. [2022-11-20 12:17:12,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 166294 states, 166293 states have (on average 1.13519510743086) internal successors, (188775), 166293 states have internal predecessors, (188775), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:17:13,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166294 states to 166294 states and 188775 transitions. [2022-11-20 12:17:13,228 INFO L78 Accepts]: Start accepts. Automaton has 166294 states and 188775 transitions. Word has length 934 [2022-11-20 12:17:13,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:17:13,228 INFO L495 AbstractCegarLoop]: Abstraction has 166294 states and 188775 transitions. [2022-11-20 12:17:13,229 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 175.5) internal successors, (702), 4 states have internal predecessors, (702), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:17:13,229 INFO L276 IsEmpty]: Start isEmpty. Operand 166294 states and 188775 transitions. [2022-11-20 12:17:13,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 985 [2022-11-20 12:17:13,274 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:17:13,275 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:17:13,275 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-11-20 12:17:13,276 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 12:17:13,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:17:13,276 INFO L85 PathProgramCache]: Analyzing trace with hash -822557926, now seen corresponding path program 1 times [2022-11-20 12:17:13,277 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:17:13,277 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1506685074] [2022-11-20 12:17:13,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:17:13,277 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:17:13,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:17:16,400 INFO L134 CoverageAnalysis]: Checked inductivity of 908 backedges. 549 proven. 218 refuted. 0 times theorem prover too weak. 141 trivial. 0 not checked. [2022-11-20 12:17:16,401 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:17:16,401 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1506685074] [2022-11-20 12:17:16,401 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1506685074] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 12:17:16,401 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1623660180] [2022-11-20 12:17:16,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:17:16,402 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:17:16,402 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0d4ddb1-dd1c-466a-8b8d-54b8ee43569d/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 12:17:16,407 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0d4ddb1-dd1c-466a-8b8d-54b8ee43569d/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 12:17:16,426 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0d4ddb1-dd1c-466a-8b8d-54b8ee43569d/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-20 12:17:16,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:17:16,843 INFO L263 TraceCheckSpWp]: Trace formula consists of 1155 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-20 12:17:16,856 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 12:17:17,121 INFO L134 CoverageAnalysis]: Checked inductivity of 908 backedges. 665 proven. 0 refuted. 0 times theorem prover too weak. 243 trivial. 0 not checked. [2022-11-20 12:17:17,122 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 12:17:17,122 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1623660180] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 12:17:17,122 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-20 12:17:17,122 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 8 [2022-11-20 12:17:17,123 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [703439501] [2022-11-20 12:17:17,123 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 12:17:17,124 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 12:17:17,124 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:17:17,125 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 12:17:17,125 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-11-20 12:17:17,125 INFO L87 Difference]: Start difference. First operand 166294 states and 188775 transitions. Second operand has 3 states, 3 states have (on average 247.66666666666666) internal successors, (743), 3 states have internal predecessors, (743), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:17:27,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:17:27,256 INFO L93 Difference]: Finished difference Result 463619 states and 529803 transitions. [2022-11-20 12:17:27,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 12:17:27,256 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 247.66666666666666) internal successors, (743), 3 states have internal predecessors, (743), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 984 [2022-11-20 12:17:27,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:17:27,885 INFO L225 Difference]: With dead ends: 463619 [2022-11-20 12:17:27,885 INFO L226 Difference]: Without dead ends: 287764 [2022-11-20 12:17:28,021 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 989 GetRequests, 983 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-11-20 12:17:28,031 INFO L413 NwaCegarLoop]: 2731 mSDtfsCounter, 1515 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 3810 mSolverCounterSat, 2048 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1515 SdHoareTripleChecker+Valid, 2827 SdHoareTripleChecker+Invalid, 5858 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2048 IncrementalHoareTripleChecker+Valid, 3810 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.1s IncrementalHoareTripleChecker+Time [2022-11-20 12:17:28,032 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1515 Valid, 2827 Invalid, 5858 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2048 Valid, 3810 Invalid, 0 Unknown, 0 Unchecked, 8.1s Time] [2022-11-20 12:17:28,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 287764 states. [2022-11-20 12:17:30,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 287764 to 274093. [2022-11-20 12:17:30,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 274093 states, 274092 states have (on average 1.1218860820454446) internal successors, (307500), 274092 states have internal predecessors, (307500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:17:31,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 274093 states to 274093 states and 307500 transitions. [2022-11-20 12:17:31,777 INFO L78 Accepts]: Start accepts. Automaton has 274093 states and 307500 transitions. Word has length 984 [2022-11-20 12:17:31,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:17:31,778 INFO L495 AbstractCegarLoop]: Abstraction has 274093 states and 307500 transitions. [2022-11-20 12:17:31,779 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 247.66666666666666) internal successors, (743), 3 states have internal predecessors, (743), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:17:31,779 INFO L276 IsEmpty]: Start isEmpty. Operand 274093 states and 307500 transitions. [2022-11-20 12:17:31,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1062 [2022-11-20 12:17:31,796 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:17:31,797 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:17:31,816 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0d4ddb1-dd1c-466a-8b8d-54b8ee43569d/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-20 12:17:32,003 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0d4ddb1-dd1c-466a-8b8d-54b8ee43569d/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:17:32,003 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 12:17:32,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:17:32,004 INFO L85 PathProgramCache]: Analyzing trace with hash 1130098019, now seen corresponding path program 1 times [2022-11-20 12:17:32,004 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:17:32,004 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1184723225] [2022-11-20 12:17:32,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:17:32,005 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:17:32,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:17:33,061 INFO L134 CoverageAnalysis]: Checked inductivity of 1220 backedges. 630 proven. 0 refuted. 0 times theorem prover too weak. 590 trivial. 0 not checked. [2022-11-20 12:17:33,061 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:17:33,061 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1184723225] [2022-11-20 12:17:33,061 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1184723225] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 12:17:33,062 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 12:17:33,062 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-20 12:17:33,062 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [555355368] [2022-11-20 12:17:33,062 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 12:17:33,063 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 12:17:33,064 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:17:33,064 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 12:17:33,064 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-20 12:17:33,065 INFO L87 Difference]: Start difference. First operand 274093 states and 307500 transitions. Second operand has 4 states, 4 states have (on average 174.0) internal successors, (696), 4 states have internal predecessors, (696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:17:51,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:17:51,137 INFO L93 Difference]: Finished difference Result 819839 states and 934255 transitions. [2022-11-20 12:17:51,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-20 12:17:51,137 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 174.0) internal successors, (696), 4 states have internal predecessors, (696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 1061 [2022-11-20 12:17:51,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:17:51,923 INFO L225 Difference]: With dead ends: 819839 [2022-11-20 12:17:51,923 INFO L226 Difference]: Without dead ends: 548478 [2022-11-20 12:17:52,071 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-20 12:17:52,073 INFO L413 NwaCegarLoop]: 769 mSDtfsCounter, 5225 mSDsluCounter, 156 mSDsCounter, 0 mSdLazyCounter, 5927 mSolverCounterSat, 4327 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5225 SdHoareTripleChecker+Valid, 925 SdHoareTripleChecker+Invalid, 10254 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 4327 IncrementalHoareTripleChecker+Valid, 5927 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 14.9s IncrementalHoareTripleChecker+Time [2022-11-20 12:17:52,085 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5225 Valid, 925 Invalid, 10254 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [4327 Valid, 5927 Invalid, 0 Unknown, 0 Unchecked, 14.9s Time] [2022-11-20 12:17:53,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 548478 states. [2022-11-20 12:17:59,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 548478 to 548457. [2022-11-20 12:17:59,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 548457 states, 548456 states have (on average 1.1068107560132445) internal successors, (607037), 548456 states have internal predecessors, (607037), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:18:01,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 548457 states to 548457 states and 607037 transitions. [2022-11-20 12:18:01,119 INFO L78 Accepts]: Start accepts. Automaton has 548457 states and 607037 transitions. Word has length 1061 [2022-11-20 12:18:01,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:18:01,120 INFO L495 AbstractCegarLoop]: Abstraction has 548457 states and 607037 transitions. [2022-11-20 12:18:01,121 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 174.0) internal successors, (696), 4 states have internal predecessors, (696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:18:01,121 INFO L276 IsEmpty]: Start isEmpty. Operand 548457 states and 607037 transitions. [2022-11-20 12:18:01,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1324 [2022-11-20 12:18:01,161 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:18:01,162 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:18:01,162 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-11-20 12:18:01,163 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 12:18:01,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:18:01,163 INFO L85 PathProgramCache]: Analyzing trace with hash 769014354, now seen corresponding path program 1 times [2022-11-20 12:18:01,164 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:18:01,164 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [371226207] [2022-11-20 12:18:01,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:18:01,164 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:18:01,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:18:05,310 INFO L134 CoverageAnalysis]: Checked inductivity of 945 backedges. 435 proven. 485 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-11-20 12:18:05,310 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:18:05,310 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [371226207] [2022-11-20 12:18:05,311 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [371226207] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 12:18:05,311 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [934290476] [2022-11-20 12:18:05,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:18:05,311 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:18:05,311 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0d4ddb1-dd1c-466a-8b8d-54b8ee43569d/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 12:18:05,312 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0d4ddb1-dd1c-466a-8b8d-54b8ee43569d/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 12:18:05,313 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0d4ddb1-dd1c-466a-8b8d-54b8ee43569d/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-20 12:18:05,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:18:05,856 INFO L263 TraceCheckSpWp]: Trace formula consists of 1482 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-20 12:18:05,869 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 12:18:06,237 INFO L134 CoverageAnalysis]: Checked inductivity of 945 backedges. 460 proven. 0 refuted. 0 times theorem prover too weak. 485 trivial. 0 not checked. [2022-11-20 12:18:06,237 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 12:18:06,237 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [934290476] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 12:18:06,237 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-20 12:18:06,238 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 8 [2022-11-20 12:18:06,240 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [861037247] [2022-11-20 12:18:06,240 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 12:18:06,243 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 12:18:06,243 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:18:06,243 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 12:18:06,243 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-11-20 12:18:06,244 INFO L87 Difference]: Start difference. First operand 548457 states and 607037 transitions. Second operand has 3 states, 3 states have (on average 279.6666666666667) internal successors, (839), 3 states have internal predecessors, (839), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)